'has a brother who grows groundnuts in Tanganyika'..... it's one of the last lines of The Happiest Days of Your Life...

Oh my! I didn't know! I'm moved to tears, which someday, when we meet, I'll explain.

BTW, I'm one of very, very, very small number of people who know a lot, a lot, a lot about growing things in Tanganyika, but it ain't groundnuts. No groundnuts growing in Tanganyika these days, I assure you with complete confidence.